HIV Infection Linked to Higher Stroke Risk Through Key Blood Proteins

A new study has uncovered a key molecular link between HIV infection and an increased risk of stroke. Researchers found that elevated levels of specific proteins in the blood may drive inflammation and vascular damage in people living with HIV. The findings could pave the way for early detection methods and targeted treatments. The study used targeted plasma proteomics to analyse blood samples from HIV-positive stroke patients. Compared to HIV-negative individuals and those without stroke, the team observed distinct protein expression profiles. In particular, proteins from the tumour necrosis factor receptor superfamily (TNFRSF) were significantly elevated in HIV-infected stroke patients.

These TNFRSF proteins play a crucial role in immune responses, controlling processes like cell death, inflammation, and cell growth. The research showed that their upregulation correlates with higher levels of systemic inflammation and abnormal blood clotting. This creates conditions that weaken blood vessels, increase immune cell recruitment, and compromise the blood-brain barrier—all of which contribute to stroke risk.

Beyond identifying the problem, the study highlights the potential of proteomics as a tool for uncovering complex disease mechanisms. The researchers suggest that TNFRSF signaling could be a target for new therapies aimed at reducing inflammation and vascular damage in HIV patients. Such interventions might lower the likelihood or severity of strokes in this high-risk group. The discovery of TNFRSF proteins as central mediators in HIV-associated stroke opens doors for two key advancements. First, blood-based biomarkers could be developed to identify HIV-positive individuals at heightened stroke risk. Second, therapies targeting this signaling pathway may offer a way to reduce stroke incidence in people living with HIV. The findings also have broader implications, as TNFRSF-mediated inflammation is involved in other neurovascular and inflammatory disorders.